Amplitude control of the track-induced self-excited vibration for a maglev system

- This paper investigates the principle of the track-induced self-excited vibration.
- The amplitude of the vibration is investigated using the harmonic balance method.
- We discover that the amplitude of the vibration is mainly decided by the voltage of the power supplier.
- We provide a simple scheme to suppress the track-induced self-excited vibration.

The Electromagnet Suspension (EMS) maglev train uses controlled electromagnetic forces to achieve suspension, and self-excited vibration may occur due to the flexibility of the track. In this article, the harmonic balance method is applied to investigate the amplitude of the self-excited vibration, and it is found that the amplitude of the vibration depends on the voltage of the power supplier. Based on this observation, a vibration amplitude control method, which controls the amplitude of the vibration by adjusting the voltage of the power supplier, is proposed to attenuate the vibration. A PI controller is designed to control the amplitude of the vibration at a given level. The effectiveness of this method shows a good prospect for its application to commercial maglev systems.